Organic light-emitting device

ABSTRACT

An organic light-emitting device including a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer includes at least one first material represented by Formula 1 and at least one second material represented by Formula 2:

CROSS-REFERENCE TO RELATED APPLICATION

Korean Patent Application No. 10-2014-0069566, filed on Jun. 9, 2014, in the Korean Intellectual Property Office, and entitled: “Organic Light-Emitting Device,” is incorporated by reference herein in its entirety.

BACKGROUND

1. Field

Embodiments relate to an organic light-emitting device.

2. Description of the Related Art

Organic light emitting devices are self-emission devices that have wide viewing angles, high contrast ratios, short response times, and excellent brightness, driving voltage, and response speed characteristics, and produce full-color images.

The organic light-emitting device may include a first electrode disposed on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode, which are sequentially disposed on the first electrode. Holes provided from the first electrode may move toward the emission layer through the hole transport region, and electrons provided from the second electrode may move toward the emission layer through the electron transport region. Carriers, such as holes and electrons, may be recombined in the emission layer to produce excitons. These excitons may change from an excited state to a ground state, thereby generating light.

SUMMARY

Embodiments are directed to an organic light-emitting device

One or more embodiments provides an organic light-emitting device including a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, the organic layer includes at least one material selected from first materials represented by Formula 1 and at least one material selected from second materials represented by Formula 2:

wherein in Formulae 1 and 2,

L₁₁, L₂₁, and L₂₂ may be each independently selected from a substituted or unsubstituted C₆-C₆₀ arylene group and a substituted or unsubstituted C₁-C₆₀ heteroarylene group;

L₁₂ may be selected from a substituted or unsubstituted phenylene group and a substituted or unsubstituted naphthylenyl group;

a11 may be 0 or 1;

a12 may be 1 or 2;

a21 and a22 may be each independently selected from 0, 1, and 2;

R₁₁ and R₁₂ may be each independently selected from a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group;

R₂₁ and R₂₂ may be each independently selected from a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolinyl group, and a substituted or unsubstituted isoquinolinyl group;

b11, b12, b21, and b22 may be each independently selected from 1, 2, and 3;

R₁₃, R₁₄, R₂₃, and R₂₄ may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₁)(Q₂)(Q₃);

b13, b14, b23, and b24 may be each independently selected from 1, 2, 3 and 4;

at least one of substituents of the substituted C₆-C₆₀ arylene group, the substituted C₁-C₆₀ heteroarylene group, the substituted a phenylene group, the substituted naphthylenyl group, the substituted C₆-C₆₀ aryl group, the substituted C₁-C₆₀ heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed hetero-polycyclic group, the substituted pyridyl group, the substituted quinolinyl group, the substituted isoquinolinyl group, the substituted C₁-C₆₀ alkyl group, the substituted C₁-C₆₀ alkoxy group, the substituted C₃-C₁₀ cycloalkyl group, and the substituted C₆-C₆₀ aryloxy group may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃); and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

Q₁ to Q₃, Q₁₁ to Q₁₃, Q₂₁ to Q₂₃ and Q₃₁ to Q₃₃ may be each independently selected from a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.

BRIEF DESCRIPTION OF THE DRAWING

Features will be apparent to those of skill in the art by describing in detail exemplary embodiments with reference to the attached drawing in which:

FIG. 1 illustrates a schematic cross-sectional view of an organic light-emitting device according to an embodiment.

DETAILED DESCRIPTION

Example embodiments will now be described more fully hereinafter with reference to the accompanying drawing; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey exemplary implementations to those skilled in the art.

In the drawing FIGURE, the dimensions of layers and regions may be exaggerated for clarity of illustration. Like reference numerals refer to like elements throughout.

Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.

As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms “comprises” and/or “comprising” used herein specify the presence of stated features or components, but do not preclude the presence or addition of one or more other features or components.

It will be understood that when a layer, region, or component is referred to as being “on” or “onto” another layer, region, or component, it can be directly or indirectly formed on the other layer, region, or component. That is, for example, intervening layers, regions, or components may be present.

The term “(an organic layer) includes at least one selected from first materials” or “(an organic layer) includes a first material” used herein includes a case in which “(an organic layer) includes one kind of material selected from first materials represented by Formula 1 and a case in which (an organic layer) includes two or more different kinds of materials selected from first materials represented Formula 1”.

In FIG. 1, a substrate may be additionally disposed under a first electrode 110 or above a second electrode 190. The substrate may be a glass substrate or transparent plastic substrate, each with excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water repellency.

The first electrode 110 may be formed by depositing or sputtering a material for forming the first electrode on the substrate. When the first electrode 110 is an anode, the material for the first electrode 110 may be selected from materials with a high work function to facilitate hole injection. The first electrode 110 may be a reflective electrode or a transmissive electrode. The material for the first electrode 110 may be a transparent and highly conductive material, and examples of such a material may include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO₂), and zinc oxide (ZnO). When the first electrode 110 is a semi-transmissive electrode or a reflective electrode, as a material for forming the first electrode, at least one of magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag) may be used.

The first electrode 110 may have a single-layer structure, or a multi-layer structure including two or more layers. For example, the first electrode 110 may have a three-layered structure of ITO/Ag/ITO, but the structure of the first electrode 110 is not limited thereto.

An organic layer 150 may be disposed on the first electrode 110. The organic layer 150 may include an emission layer.

The organic layer 150 may include at least one selected from first materials represented by Formula 1 and at least one selected from second materials represented by Formula 2. For example, the organic layer 150 may include a first material represented by Formula 1 and a second material represented by Formula 2.

In Formulae 1 and 2,

L₁₁, L₂₁, and L₂₂ may be each independently selected from a substituted or unsubstituted C₆-C₆₀ arylene group and a substituted or unsubstituted C₁-C₆₀ heteroarylene group;

L₁₂ may be selected from a substituted or unsubstituted phenylene group and a substituted or unsubstituted naphthylenyl group;

a11 may be 0 or 1;

a12 may be 1 or 2;

a21 and a22 may be each independently selected from 0, 1, and 2;

R₁₁ and R₁₂ may be each independently selected from a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group;

R₂₁ and R₂₂ may be each independently selected from a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolinyl group, and a substituted or unsubstituted isoquinolinyl group;

b11, b12, b21, and b22 may be each independently selected from 1, 2, and 3;

R₁₃, R₁₄, R₂₃, and R₂₄ may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstituted C₁-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₁)(Q₂)(Q₃);

b13, b14, b23, and b24 may be each independently selected from 1, 2, 3 and 4;

at least one of substituents of the substituted C₆-C₆₀ arylene group, the substituted C₁-C₆₀ heteroarylene group, the substituted a phenylene group, the substituted naphthylenyl group, the substituted C₆-C₆₀ aryl group, the substituted C₁-C₆₀ heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed hetero-polycyclic group, the substituted pyridyl group, the substituted quinolinyl group, the substituted isoquinolinyl group, the substituted C₁-C₆₀ alkyl group, the substituted C₁-C₆₀ alkoxy group, the substituted C₃-C₁₀ cycloalkyl group, and the substituted C₆-C₆₀ aryloxy group may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₁-C₆₀ aryl group, a C₁-C₆₀ aryloxy group, a C₁-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃); and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

wherein Q₁ to Q₃, Q₁₁ to Q₁₃, Q₂₁ to Q₂₃ and Q₃₁ to Q₃₃ may be each independently selected from a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.

For example, L₁₁, L₂₁, and L₂₂ in Formulae 1 and 2 may be each independently selected from a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an indolylene indolylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a benzofuranylene group, a benzothiophenylene group, a triazolylene group, a tetrazolylene group, a triazinylene triazinylene group, a dibenzofuranylene group, and a dibenzothiophenylene group; and

a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an indolylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a benzofuranylene group, a benzothiophenylene group, a triazolylene group, a tetrazolylene group, a triazinylene group, a dibenzofuranylene group, and a dibenzothiophenylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, and an imidazopyridinyl group, but they are not limited thereto.

In some embodiments, L₁₁, L₂₁, and L₂₂ in Formulae 1 and 2 may be each independently selected from a phenylene group, a naphthylene group, a pyridinylene group, a quinolinylene group and an isoquinolinylene group; and

a phenylene group, a naphthylene group, a pyridinylene group, a quinolinylene group, and an isoquinolinylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group, but they are not limited thereto.

In some embodiments, L₁₁, L₂₁, and L₂₂ in Formulae 1 and 2 may be each independently selected from a group represented by any one of Formulae 3-1 to 3-6, but they are not limited thereto.

In Formulae 3-1 to 3-6, * and *′ indicate binding sites to a neighboring atom.

For example, L₁₂ in Formula 1 may be selected from a phenylene group and a naphthylenyl group, but is not limited thereto.

a11 in Formula 1 indicates the number of L₁₁, and when a11 is 0, (L₁₁)_(a11) may indicate a direct bond.

a12 in Formula 1 indicates the number of L₁₂, and when a12 is 2, a plurality of L₁₂ may be identical or different.

a21 in Formula 2 indicates the number of L₂₁, and when a21 is 2, a plurality of L₂₁ may be identical or different. When a21 is 0, (L₂₁)_(a21) may indicate a direct bond.

a22 in Formula 2 indicates the number of L₂₂, and when a22 is 2, a plurality of L₂₂ may be identical or different. When a22 is 0, (L₂₂)_(a22) may indicate a direct bond.

For example, R₁₁ and R₁₂ in Formula 1 may be each independently selected from a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, a azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, a ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, a imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, a oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, but they are not limited thereto.

In some embodiments, R₁₁ and R₁₂ in Formula 1 may be each independently selected from a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group, but they are not limited thereto.

In some embodiments, R₁₁ and R₁₂ in Formula 1 may be each independently selected from a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group, but they are not limited thereto.

In other embodiments, R₁₁ and R₁₂ in Formula 1 may be each independently selected from a group represented by any one of one of Formulae 4-1 to 4-9 below, but they are not limited thereto.

In Formulae 4-1 to 4-9, * indicates a binding site to a neighboring atom.

For example, R₂₁ and R₂₂ in Formula 2 may be each independently selected from a pyridyl group, a quinolinyl group, and an isoquinolinyl group, but they are not limited thereto.

In some embodiments, R₂₁ and R₂₂ in Formula 2 may be each independently selected from a group represented by any one of one of Formulae 5-1 to 5-17 below, but they are not limited thereto.

In Formulae 5-1 to 5-17, * indicates a binding site to a neighboring atom.

In some embodiments, R₂₁ and R₂₂ in Formula 2 may be each independently a group selected from Formulae 5-1, 5-2, 5-5, and 5-13, but they are not limited thereto.

In Formulae 5-1, 5-2, 5-5, and 5-13, * indicates a binding site to a neighboring atom.

b11, b12, b21 and b22 in Formula 1 and 2 respectively indicate the number of R₁₁, R₁₂, R₂₁, and R₂₂, and when each of b11, b12, b21, and b22 is 2 or 3, a plurality of R₁₁, R₁₂, R₂₁, and R₂₂ may be identical or different.

For example, R₁₃, R₁₄, R₂₃, and R₂₄ in Formulae 1 and 2 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethyl group, n-a propyl group, iso-a propyl group, an n-butyl group, a sec-butyl group, iso-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, an n-octyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, but they are not limited thereto.

In some embodiments, R₁₃, R₁₄, R₂₃, and R₂₄ in Formulae 1 and 2 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethyl group, n-a propyl group, iso-a propyl group, an n-butyl group, a sec-butyl group, iso-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, and an n-octyl group, a group represented by one of Formulae 4-1 to 4-9 and a group represented by one of Formulae 5-1 to 5-17, but they are not limited thereto.

In Formulae 4-1 to 4-9 and 5-1 to 5-17, * indicates a binding site to a neighboring atom.

b13, b14, b23, and b24 in Formula 1 and 2 respectively indicate the number of R₁₃, R₁₄, R₂₃, and R₂₄, and when each of b13, b14, b23, and b24 is selected from 2, 3, and 4, a plurality of R₁₃, R₁₄, R₂₃, and R₂₄ may be identical or different.

For example, the first materials may be represented by any one of Formulae 1A and 1B below, and the second materials may be represented by Formula 2 below, but they are not limited thereto.

In Formulae 1A, 1B, and 2, L₁₁, a11, R₁₁ to R₁₄, b11 to b14, L₂₁, L₂₂, a21, a22, R₂₁ to R₂₄, and b21 to b24 have already described above.

In some embodiments, the first materials may be represented by any one of Formulae 1A and 1B below, and the second materials may be represented by one of Formulae 2A to 2C below, but they are not limited thereto.

In Formulae 1A, 1B, and 2A to 2C, L₁₁, a11, R₁₁ to R₁₄, b11 to b14, L₂₁, L₂₂, a21, a22, R₂ to R₂₄, and b22 to b24 have already described above.

In some embodiments, the first materials may be represented by any one of Formulae 1A-1 and 1B-1 below, and the second materials may be represented by one of Formulae 2A to 2C below, but they are not limited thereto.

In Formulae 1A-1, 1B-1, and 2A to 2C, L₁₁, a11, R₁₁ to R₁₄, b11 to b14, L₂₁, L₂₂, a21, a22, R₂₂ to R₂₄, and b22 to b24 have already described above.

In some embodiments, the first materials may be selected from Compounds 100 to 263 below, and the second materials may be selected from Compounds 300 to 397, but they are not limited thereto.

The second materials represented by Formula 2 may have high electron mobility. The first materials represented by Formula 1 may have higher efficiency in combination with an electron trapping dopant. Generally, in order to stably trap excitons in an emission layer, stability of an electron transporting material may be considered. The second materials represented by Formula 2 may have high stability, and a lifespan of an organic light-emitting device including the second materials may be improved.

Accordingly, an organic emitting device including the first materials represented by Formula 1 and the second materials represented by Formula 2 may have high efficiency and a long lifespan.

The organic layer 150 may further include a hole transport region 130 between the first electrode and the emission layer. The organic layer 150 may further include an electron transport region 180 between the emission layer and the second electrode.

The hole transport region 130 may include at least one selected from a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer (EBL), and the electron transport region 180 may include at least one selected from a buffer layer, an electron transport layer (ETL), and an electron injection layer (EIL), but they are not limited thereto.

The hole transport region 130 may have a single-layered structure formed of a single material, a single-layered structure formed of a plurality of different materials, or a multi-layered structure having a plurality of layers formed of a plurality of different materials.

For example, the hole transport region 130 may have a single-layered structure formed of a plurality of different materials, or a structure of hole injection layer/hole transport layer, a structure of hole injection layer/hole transport layer/buffer layer, a structure of hole injection layer/buffer layer, a structure of hole transport layer/buffer layer, or a structure of hole injection layer/hole transport layer/electron blocking layer, wherein layers of each structure are sequentially stacked from the first electrode 110 in this stated order, but are not limited thereto.

When the hole transport region 130 includes a hole injection layer, the hole injection layer may be formed on the first electrode 110 by using various methods, such as vacuum deposition, spin coating casting, a Langmuir-Blodgett (LB) method, ink-jet printing, laser-printing, or laser-induced thermal imaging.

When a hole injection layer is formed by vacuum deposition, for example, the vacuum deposition may be performed at a temperature of a deposition temperature of about 100 to about 500° C., at a vacuum degree of about 10⁻⁸ to about 10⁻³ torr, and at a deposition rate of about 0.01 to about 100 Å/sec, in consideration of a compound for a hole injection layer to be deposited, and the structure of a hole injection layer to be formed.

When a hole injection layer is formed by spin coating, the spin coating may be performed at a coating rate of about 2,000 rpm to about 5,000 rpm, and at a temperature of about 80° C. to 200° C., in consideration of a compound for a hole injection layer to be deposited, and the structure of a hole injection layer to be formed.

When the hole transport region 130 includes a hole transport layer, the hole transport layer may be formed on the first electrode 110 or the hole injection layer by using various methods, such as vacuum deposition, spin coating, casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When the hole transport layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the hole transport layer may be determined by referring to the deposition and coating conditions for the hole injection layer.

The hole transport region 130 may include at least one selected from m-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB, TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline/dodecylbenzenesulfonic acid (Pani/DBSA), poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), polyaniline/camphor sulfonicacid (Pani/CSA), (polyaniline)/poly(4-styrenesulfonate) (PANI/PSS), a compound represented by Formula 201 below, and a compound represented by Formula 202 below.

In Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may be each independently selected from a substituted or unsubstituted C₃-C₁₀ cycloalkylene, a substituted or unsubstituted C₃-C₁₀ heterocycloalkylene, a substituted or unsubstituted C₃-C₁₀ cycloalkenylene, a substituted or unsubstituted C₃-C₁₀ heterocycloalkenylene, a substituted or unsubstituted C₆-C₆₀ arylene, a substituted or unsubstituted C₂-C₆₀ heteroarylene, and a substituted or unsubstituted bivalent non-aromatic condensed polycyclic group,

at least one of substituents of the substituted C₃-C₁₀ cycloalkylene, the substituted C₃-C₁₀ heterocycloalkylene, substituted C₃-C₁₀ cycloalkenylene, substituted C₃-C₁₀heterocycloalkenylene, substituted C₆-C₆₀ arylene, substituted C₂-C₆₀ heteroarylene, and a substituted bivalent non-aromatic condensed polycyclic group may be selected from

a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, and a C₁-C₆₀ alkoxy;

a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, and a C₁-C₆₀ alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclic, a monovalent non-aromatic condensed heteropolycyclic, —N(Q₂₀₁)(Q₂₀₂), —Si(Q₂₀₃)(Q₂₀₄)(Q₂₀₅), and —B(Q₂₀₆)(Q₂₀₇);

a C₃-C₁₀ cycloalkyl group, a C₃-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₃-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —N(Q₂₁₁)(Q₂₁₂), —Si(Q₂₁₃)(Q₂₁₄)(Q₂₁₅), and —B(Q₂₁₆)(Q₂₁₇); and

—N(Q₂₂₁)(Q₂₂₂), —Si(Q₂₂₃)(Q₂₂₄)(Q₂₂₅), and —B(Q₂₂₆)(Q₂₂₇),

xa1 to xa4 may be each independently selected from 0, 1, 2, and 3;

xa5 may be selected from 1, 2, 3, 4, and 5; and

R₂₀₁ to R₂₀₄ may be each independently selected from

a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, and a C₁-C₆₀ alkoxy;

a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, and a C₁-C₆₀ alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclic, —N(Q₂₃₁)(Q₂₃₂), —Si(Q₂₃₃)(Q₂₃₄)(Q₂₃₅), and —B(Q₂₃₆)(Q₂₃₇);

a C₃-C₁₀ cycloalkyl group, a C₃-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₃-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; and

a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —N(Q₂₄₁)(Q₂₄₂), —Si(Q₂₄₃)(Q₂₄₄)(Q₂₄₅), and —B(Q₂₄₆)(Q₂₄₇),

Q₂₀₁ to Q₂₀₇, Q₂₁₁ to Q₂₁₇, Q₂₂₁ to Q₂₂₇, Q₂₃₁ to Q₂₃₇, and Q₂₄₁ to Q₂₄₇ may be each independently selected from:

a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₃-C₁₀cycloalkyl group, a C₃-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₃-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀cycloalkyl group, a C₃-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₃-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; and

a C₃-C₁₀cycloalkyl group, a C₃-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₃-C₁₀ heterocycloalkenyl group, a C₁-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₃-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₃-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.

wherein in Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may be each independently selected from:

a phenylene, a naphthylenylene, a fluorenylene, a spiro-fluorenylene, a benzofluorenylene, a dibenzofluorenylene, a phenanthrenylene, an anthracenylene, a pyrenylene, a chrysenylene, a pyridinylene, a pyrazinylene, a pyrimidinylene, a pyridazinylene, a quinolinylene, an isoquinolinylene, a quinoxalinylene, a quinazolinylene, a carbazolylene, and a triazinylene; and

a phenylene group, a naphthylenylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, a isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group, and a salt thereof, a sulfonic acid, and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a isoindolyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;

xa1 to xa4 may be each independently 0, 1, or 2;

xa5 may be 1, 2, or 3;

R₂₀₁ to R₂₀₅ may be each independently selected from

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a azulenyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, but are not limited thereto.

The compound represented by Formula 201 may be represented by Formula 201A.

For example, the compound represented by Formula 201 may be represented by Formula 201A-1 below, but is not limited thereto.

For example, the compound represented by Formula 202 may be represented by Formula 202A below, but is not limited thereto.

In Formulae 201A, 201A-1, and 202A, L₂₀₁ to L₂₀₃, xa1 to xa3, xa5 and R₂₀₂ to R₂₀₄ have already been described above, R₂₁₁ and R₂₁₂ may be understood by referring to the description provided in connection with R₂₀₃, and R₂₁₃ to R₂₁₆ may be each independently selected from a hydrogen, a deuterium, a halogen atom, a hydroxyl group, cyano, nitro, amino, amidino, hydrazine, a hydrazine group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, and a non-aromatic condensed polycyclic group.

For example, in Formulae 201A, 201A-1, and 202A,

L₂₀₁ to L₂₀₃ may be each independently selected from

a phenylene, a naphthylenylene, a fluorenylene, a spiro-fluorenylene, a benzofluorenylene, a dibenzofluorenylene, a phenanthrenylene, an anthracenylene, a pyrenylene, a chrysenylene, a pyridinylene, a pyrazinylene, a pyrimidinylene, a pyridazinylene, a quinolinylene, an isoquinolinylene, a quinoxalinylene, a quinazolinylene, a carbazolylene, and a triazinylene; and

a phenylene group, a naphthylenylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, a isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group, and a salt thereof, a sulfonic acid, and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;

xa1 to xa3 may be each independently 0 or 1;

R₂₀₃, R₂₁₁, and R₂₁₂ may be each independently selected from

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;

R₂₁₃ and R₂₁₄ may be each independently selected from

a C₁-C₂₀ alkyl and a C₁-C₂₀ alkoxy;

a C₁-C₂₀ alkyl and a C₁-C₂₀ alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl, a C₁-C₂₀ alkoxy, a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl;

R₂₁₅ and R₂₁₆ may be each independently selected from

a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,

a C₁-C₂₀ alkyl and a C₁-C₂₀ alkoxy;

a C₁-C₂₀ alkyl and a C₁-C₂₀ alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, and a triazinyl group; and

a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl, a C₁-C₂₀ alkoxy, a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl; and

xa5 is 1 or 2.

R₂₁₃ and R₂₁₄ in Formulae 201A, and 201A-1 may bind to each other to form a saturated or unsaturated ring.

The compound represented by Formula 201, and the compound represented by Formula 202 may each include compounds HT1 to HT20 illustrated below, but are not limited thereto.

A thickness of the hole transport region 130 may be in a range of about 100 Å to about 10,000 Å, e.g., about 100 Å to about 1000 Å. When the hole transport region 130 includes both a hole injection layer and a hole transport layer, a thickness of the hole injection layer may be in a range of about 100 Å to about 10000 Å, e.g., about 100 Å to about 1000 Å, and a thickness of the hole transport layer may be in a range of about 50 Å to about 2000 Å, e.g., about 100 Å to about 1500 Å. When the thicknesses of the hole transport region 130, the hole injection layer, and the hole transport layer are within these ranges, satisfactory hole transporting characteristics may be obtained without a substantial increase in driving voltage.

The hole transport region 130 may further include, in addition to these materials, a charge-generation material for the improvement of conductive properties. The charge-generation material may be homogeneously or non-homogeneously dispersed in the hole transport region 130.

The charge-generation material may be, e.g., a p-dopant. The p-dopant may be one of a quinone derivative, a metal oxide, and a cyano group-containing compound, but is not limited thereto. For example, non-limiting examples of the p-dopant are a quinone derivative, such as tetracyanoquinonedimethane (TCNQ) or 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); a metal oxide, such as a tungsten oxide or a molybdenum oxide, and Compound HT-D1 illustrated below, but are not limited thereto.

The hole transport region 130 may further include, in addition to the hole injection layer and the hole transport layer, at least one of a buffer layer and an electron blocking layer. The buffer layer may compensate for an optical resonance distance according to a wavelength of light emitted from the emission layer, and light-emission efficiency of a formed organic light-emitting device may be improved. For use as a material included in the buffer layer, materials that are included in the hole transport region 130 may be used. The electron blocking layer may help prevent injection of electrons from the electron transport region 130.

An emission layer may be formed on the first electrode 110 or the hole transport region 130 by using various methods, such as vacuum deposition, spin coating, casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When the emission layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the emission layer may be determined by referring to the deposition and coating conditions for the hole injection layer.

When the organic light-emitting device 10 is a full color organic light-emitting device, the emission layer may be patterned into a red emission layer, a green emission layer, or a blue emission layer, according to a sub pixel. In some embodiments, the emission layer may have a stacked structure of a red emission layer, a green emission layer, and a blue emission layer, or may include a red-light emission material, a green-light emission material, and a blue-light emission material, which are mixed with each other in a single layer, to emit white light. According to another embodiment, the emission layer may be a white emission layer, and may further include a color converting layer or a color filter to turn white light into light of a desired color.

The emission layer may include a host and a dopant.

The host may include at least one first material represented by Formula 1.

The dopant may be at least one selected from a fluorescent dopant and a phosphorescent dopant.

The fluorescent dopant may include a compound represented by Formula 501 below.

In Formula 501,

Ar₅₀₁ may be selected from:

a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene; and

a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q₅₀₁)(Q₅₀₂)(Q₅₀₃) (Q₅₀₁ to Q₅₀₃ may be each independently selected from a hydrogen, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₆-C₆₀ aryl, and a C₂-C₆₀ heteroaryl);

L₅₀₁ to L₅₀₃ may be understood by referring to the description provided herein in connection with L₂₀₁;

R₅₀₁ and R₅₀₂ may be each independently selected from

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and

a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl, a C₁-C₂₀ alkoxy, a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, a triazinyl, a dibenzofuranyl, and a dibenzothiophenyl; and

xd1 to xd3 may be each independently selected from 0, 1, 2, and 3; and

xd4 may be selected from 1, 2, 3, and 4.

The fluorescent dopant may include at least one of Compounds FD1 to FD8:

An amount of the dopant in the emission layer may be, e.g., in a range of about 0.01 to about 15 parts by weight based on 100 parts by weight of the host, but is not limited thereto.

A thickness of the emission layer may be in a range of about 100 Å to about 1,000 Å, e.g., about 200 Å to about 600 Å. When the thickness of the emission layer is within this range, excellent light-emission characteristics may be obtained without a substantial increase in driving voltage.

Then, the electron transport region 180 may be disposed on the emission layer.

The electron transport region 180 may include at least one selected from a buffer layer, an electron transport layer (ETL), and an electron injection layer, but is not limited thereto.

For example, the electron transport region 180 may have an electron transport layer alone, a structure of electron transport layer/electron injection layer, or a structure of buffer layer/electron transport layer/electron injection layer, wherein layers of each structure are sequentially stacked from the emission layer in this stated order, but is not limited thereto.

The electron transport region 180 may include a buffer layer. The buffer layer may be formed, when the emission layer includes a phosphorescent dopant, to help prevent diffusion of excitons or holes into an electron transport layer.

When the electron transport region 180 includes the buffer layer, the buffer layer may be formed on the emission layer by using various methods, such as vacuum deposition, spin coating casting, a Langmuir-Blodgett (LB) method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When the buffer layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the buffer layer may be determined by referring to the deposition and coating conditions for the hole injection layer.

In an implementation, the buffer layer may include, e.g., at least one second material represented by Formula 2.

A thickness of the buffer layer may be in a range of about 20 Å to about 1,000 Å, e.g., about 30 Å to about 300 Å. When the thickness of the hole blocking layer is within these ranges, the hole blocking layer may have excellent hole blocking characteristics without a substantial increase in driving voltage.

The electron transport region 180 may include an electron transport layer. The electron transport layer may be formed on the emission layer or the buffer layer by using various methods, e.g., vacuum deposition, spin coating casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When an electron transport layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the electron transport layer may be determined by referring to the deposition and coating conditions for the hole injection layer.

The electron transport layer may include at least one selected from a second material represented by Formula 2, BCP, Bphen, Alq₃, Balq, TAZ, NTAZ, and a compound represented by Formula 601 below.

Ar₆₀₁-[(L₆₀₁)_(xe1)-E₆₀₁]_(xe2)

In Formula 601,

Ar₆₀₁ may be selected from

a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene; and

a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano group, a nitro group, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl, a C₃-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₃-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio, a C₂-C₆₀ heteroaryl, a non-aromatic condensed polycyclic group, and —Si(Q₃₀₁)(Q₃₀₂)(Q₃₀₃) (Q₃₀₁ to Q₃₀₃ may be each independently selected from a hydrogen, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₆-C₆₀ aryl, and a C₂-C₆₀ heteroaryl);

L₆₀₁ may be understood by referring to the description provided in connection with L₂₀₁;

E₆₀₁ may be selected from

a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and

a pyrrolyl group, a thiophenyl group, a furanyl group, a imidazolyl group, a pyrazolyl group, a thiazolyl group, a isothiazolyl group, a oxazolyl group, a isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a isoindolyl group, a indolyl group, a indazolyl group, a purinyl group, a quinolinyl group, a isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, a acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a isobenzothiazolyl group, a benzooxazolyl group, a isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, a oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a pentalenyl group, a indenyl group, a naphthyl group, a azulenyl group, a heptalenyl group, a indacenyl group, a acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a pycenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, a ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, a imidazolyl group, a pyrazolyl group, a thiazolyl group, a isothiazolyl group, a oxazolyl group, a isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a isoindolyl group, a indolyl group, a indazolyl group, a purinyl group, a quinolinyl group, a isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, a acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a isobenzothiazolyl group, a benzooxazolyl group, a isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, a oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and

xe1 may be selected from 0, 1, 2, and 3; and

xe2 may be selected from 1, 2, 3, and 4.

In some embodiments, the electron transport layer may further include at least one of compounds represented by Formula 602 below.

In Formula 602,

X₆₁₁ may be N or C-(L₆₁₁)_(xe611)-R₆₁₁, X₆₁₂ may be N or C-(L₆₁₂)_(xe612)-R₆₁₂, X₆₁₃ may be N or C-(L₆₁₃)_(xe613)-R₆₁₃, and at least one of X₆₁₁ to X₆₁₃ may be N;

L₆₁₁ to L₆₁₆ may be understood by referring to the description provided herein in connection with L₂₀₁;

R₆₁₁ and R₆₁₆ may be each independently selected from

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, an azulenyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

xe611 to xe616 may be each independently selected from 0, 1, 2, and 3.

The compound represented by Formula 601 and the compound represented by Formula 602 may include at least one of Compounds ET1 to ET15 illustrated below.

A thickness of the electron transport layer may be in a range of about 100 Å to about 1,000 Å, e.g., about 150 Å to about 500 Å. When the thickness of the electron transport layer is within the range described above, the electron transport layer may have satisfactory electron transport characteristics without a substantial increase in driving voltage.

In an implementation, the electron transport layer may further include, in addition to the materials described above, a metal-containing material.

The metal-containing material may include a Li complex. The Li complex may include, e.g., Compound ET-D1 (lithium quinolate, LiQ) or ET-D2.

The electron transport region 180 may include an electron injection layer that allows electrons to be easily provided from the second electrode 190.

The electron injection layer may be formed on the electron transport layer by using various methods, such as vacuum deposition, spin coating casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When an electron injection layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the electron injection layer may be determined by referring to the deposition and coating conditions for the hole injection layer.

The electron injection layer may include at least one selected from, LiF, NaCl, CsF, Li₂O, BaO, and LiQ.

A thickness of the electron injection layer may be in a range of about 1 Å to about 100 Å, e.g., about 3 Å to about 90 Å. When the thickness of the electron injection layer is within the range described above, the electron injection layer may have satisfactory electron injection characteristics without a substantial increase in driving voltage.

The second electrode 190 may be disposed on the organic layer 150 having such a structure. The second electrode 190 may be a cathode, which is an electron injection electrode, and in this regard, a material for the second electrode 190 may include a metal, an alloy, an electrically conductive compound, and a mixture thereof, which have a relatively low work function. Detailed examples of the second electrode 190 may include lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), or magnesium-silver (Mg—Ag). According to another embodiment, the material for forming the second electrode 190 may include ITO or IZO. The second electrode 190 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode.

Hereinbefore, the organic light-emitting device has been described with reference to FIG. 1, but is not limited thereto.

A C₁-C₆₀ alkyl group used herein refers to a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and detailed examples thereof are a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, a ter-butyl group, a pentyl group, an iso-amyl group, and a hexyl group. A C₁-C₆₀ alkylene group used herein refers to a divalent group having the same structure as the C₁-C₆₀ alkyl group.

A C₁-C₆₀ alkoxy group used herein refers to a monovalent group represented by —OA₁₀₁ (wherein A₁₀₁ is the C₁-C₆₀ alkyl group), and detailed examples thereof are a methoxy group, an ethoxy group, and an isopropyloxy group.

A C₂-C₆₀ alkenyl group used herein refers to a hydrocarbon group formed by substituting at least one carbon double bond in the middle or terminal of the C₂-C₆₀ alkyl group, and detailed examples thereof are an ethenyl group, a prophenyl group, and a butenyl group. A C₂-C₆₀ alkenylene group used herein refers to a divalent group having the same structure as the C₂-C₆₀ alkenyl group.

A C₂-C₆₀ alkynyl group used herein refers to a hydrocarbon group formed by substituting at least one carbon triple bond in the middle or terminal of the C₂-C₆₀ alkyl group, and detailed examples thereof are an ethynyl group, and a propynyl group. A C₂-C₆₀ alkynylene group used herein refers to a divalent group having the same structure as the C₂-C₆₀ alkynyl group.

A C₃-C₁₀ cycloalkyl group used herein refers to a monovalent hydrocarbon monocyclic group having 3 to 10 carbon atoms, and detailed examples thereof are a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group. A C₃-C₁₀ cycloalkylene group used herein refers to a divalent group having the same structure as the C₃-C₁₀ cycloalkyl group.

A C₂-C₁₀ heterocycloalkyl group used herein refers to a monovalent monocyclic group having at least one hetero atom selected from N, O, P, and S as a ring-forming atom and 2 to 10 carbon atoms, and detailed examples thereof are a tetrahydrofuranyl group, and a tetrahydrothiophenyl group. A C₂-C₁₀ heterocycloalkylene group used herein refers to a divalent group having the same structure as the C₂-C₁₀ heterocycloalkyl group.

A C₃-C₁₀ cycloalkenyl group used herein refers to a monovalent monocyclic group that has 3 to 10 carbon atoms and at least one double bond in the ring thereof and does not have aromacity, and detailed examples thereof are a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group. A C₃-C₁₀ cycloalkenylene group used herein refers to a divalent group having the same structure as the C₃-C₁₀ cycloalkenyl group.

A C₂-C₁₀ heterocycloalkenyl group used herein refers to a monovalent monocyclic group that has at least one hetero atom selected from N, O, P, and S as a ring-forming atom, 2 to 10 carbon atoms, and at least one double bond in its ring. Detailed examples of the C₂-C₁₀ heterocycloalkenyl group are a 2,3-hydrofuranyl group and a 2,3-hydrothiophenyl group. A C₂-C₁₀ heterocycloalkenylene group used herein refers to a divalent group having the same structure as the C₂-C₁₀ heterocycloalkenyl group.

A C₆-C₆₀ aryl group used herein refers to a monovalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms, and a C₆-C₆₀ arylene group used herein refers to a divalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms. Detailed examples of the C₆-C₆₀ aryl group are a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and a chrysenyl group. When the C₆-C₆₀ aryl group and the C₆-C₆₀ arylene group each include two or more rings, the rings may be fused to each other.

A C₂-C₆₀ heteroaryl group used herein refers to a monovalent group having a carboncyclic aromatic system that has at least one hetero atom selected from N, O, P, and S as a ring-forming atom, and 2 to 60 carbon atoms. A C₂-C₆₀ heteroarylene group used herein refers to a divalent group having a carbocyclic aromatic system that has at least one hetero atom selected from N, O, P, and S as a ring-forming atom, and 2 to 60 carbon atoms. Examples of the C₂-C₆₀ heteroaryl group are a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, and an isoquinolinyl group. When the C₂-C₆₀ heteroaryl group and the C₂-C₆₀ heteroarylene group each include two or more rings, the rings may be fused to each other.

A C₆-C₆₀ aryloxy group used herein indicates —OA₁₀₂ (wherein A₁₀₂ is the C₆-C₆₀ aryl group), and a C₆-C₆₀ arylthio group indicates —SA₁₀₃ (wherein A₁₀₃ is the C₆-C₆₀ aryl group).

A monovalent non-aromatic condensed polycyclic group used herein refers to a monovalent group that has two or more rings condensed to each other, only carbon atoms (for example, the number of carbon atoms may be in a range of 8 to 60) as a ring forming atom, and non-aromacity in the entire molecular structure. An example of the monovalent non-aromatic condensed polycyclic group is a fluorenyl group. A divalent non-aromatic condensed polycyclic group used herein refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.

A monovalent non-aromatic condensed heteropolycyclic group used herein refers to a monovalent group that has two or more rings condensed to each other, has a heteroatom selected from N, O P, and S, other than carbon atoms (for example, the number of carbon atoms may be in a range of 2 to 60), as a ring forming atom, and has non-aromacity in the entire molecular structure. An example of the monovalent non-aromatic condensed heteropolycyclic group is a carbazolyl group. A divalent non-aromatic condensed heteropolycyclic group used herein refers to a divalent group having the same structure as the monovalent non-aromatic condensed heteropolycyclic group.

The term “Ph” used herein refers to phenyl group, the term “Me” used herein refers to methyl group, the term “Et” used herein refers to ethyl group, and the term “ter-Bu” or “But” used herein refers to tert-butyl.

Hereinafter, an organic light-emitting device according to an embodiment will be described in detail with reference to Synthesis Examples and Examples. The wording “B was used instead of A” used in describing Synthesis Examples means that a molar equivalent of A was identical to a molar equivalent of B.

The following Examples and Comparative Examples are provided in order to highlight characteristics of one or more embodiments, but it will be understood that the Examples and Comparative Examples are not to be construed as limiting the scope of the embodiments, nor are the Comparative Examples to be construed as being outside the scope of the embodiments. Further, it will be understood that the embodiments are not limited to the particular details described in the Examples and Comparative Examples.

EXAMPLE

Example 1

An anode was prepared by cutting a Corning 15 Ωcm² (1,200 Å) ITO glass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaning the glass substrate by using isopropyl alcohol and pure water for 5 minutes each, and then irradiating UV light for 30 minutes thereto and exposing to ozone to clean. Then, the anode was loaded into a vacuum deposition apparatus.

Compound HT13 was vacuum deposited on the substrate to form a hole injection layer having a thickness of 500 Å. Then, compound HT3, which is a hole transportable compound, was vacuum deposited thereon to form a hole transport layer having a thickness of 450 Å. Then, Compound 100A and FD1 were co-deposited at a ratio of 95:5 to form an emission layer having a thickness of 300 Å.

Then, Compound 200B was deposited on the emission layer to form an electron transport layer having a thickness of 250 Å. Then, LiF, which is a halogenated alkali metal, was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å. Al was vacuum deposited thereon to a thickness of 1500 Å (cathode), thereby completing the manufacturing of an organic light-emitting device.

Example 2

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 3

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 202B was used instead of Compound 200B.

Example 4

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 203B was used instead of Compound 200B.

Example 5

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 204B was used instead of Compound 200B.

Example 6

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 205B was used instead of Compound 200B.

Example 7

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 206B was used instead of Compound 200B.

Example 8

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 207B was used instead of Compound 200B.

Example 9

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 101A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 10

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 102A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 11

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 103A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 12

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 104A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 13

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 105A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 14

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 106A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 15

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 107A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 16

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 108A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 17

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A.

Example 18

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 19

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 202B was used instead of Compound 200B.

Example 20

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 203B was used instead of Compound 200B.

Example 21

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 204B was used instead of Compound 200B.

Example 22

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 205B was used instead of Compound 200B.

Example 23

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 206B was used instead of Compound 200B.

Example 24

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 207B was used instead of Compound 200B.

Example 25

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 110A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 26

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 111A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 27

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 112A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 28

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 113A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 29

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 114A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 30

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 115A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 1

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound H1, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 2

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound H2, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 3

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound E1, below, was used instead of Compound 200B.

Comparative Example 4

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound E2, below, was used instead of Compound 200B.

Comparative Example 5

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E1 was used instead of Compound 200B.

Comparative Example 6

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E2 was used instead of Compound 200B.

Comparative Example 7

An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound H3, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E3 was used instead of Compound 200B.

Example 31

An anode was prepared by cutting a Corning 15 Ωcm² (1,200 Å) ITO glass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaning the glass substrate by using isopropyl alcohol and pure water for 5 minutes each, and then irradiating UV light for 30 minutes thereto and exposing to ozone to clean. Then, the anode was loaded into a vacuum deposition apparatus.

Compound HT13 was vacuum deposited on the substrate to form a hole injection layer having a thickness of 500 Å. Then, compound HT3, which is a hole transportable compound, was vacuum deposited thereon to form a hole transport layer having a thickness of 450 Å. Then, Compound 100A and FD1 were co-deposited at a ratio of 95:5 to form an emission layer having a thickness of 300 Å.

Then, Compound 200B and Liq were deposited at a weight ratio of 50:50 on the emission layer to form an electron transport layer having a thickness of 250 Å, and then, LiF, which is a halogenated alkali metal, was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å, and Al was vacuum deposited thereon to a thickness of 1,500 Å (cathode), thereby completing the manufacturing of an organic light-emitting device.

Example 32

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 33

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 202B was used instead of Compound 200B.

Example 34

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 203B was used instead of Compound 200B.

Example 35

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 204B was used instead of Compound 200B.

Example 36

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 205B was used instead of Compound 200B.

Example 37

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 206B was used instead of Compound 200B.

Example 38

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 207B was used instead of Compound 200B.

Example 39

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A.

Example 40

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 41

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 202B was used instead of Compound 200B.

Example 42

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 203B was used instead of Compound 200B.

Example 43

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 204B was used instead of Compound 200B.

Example 44

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 205B was used instead of Compound 200B.

Example 45

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 206B was used instead of Compound 200B.

Example 46

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 207B was used instead of Compound 200B.

Comparative Example 8

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound H1, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 9

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound H2, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 10

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound E1, below, was used instead of Compound 200B.

Comparative Example 11

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound E2, below, was used instead of Compound 200B.

Comparative Example 12

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E1 was used instead of Compound 200B.

Comparative Example 13

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E2 was used instead of Compound 200B.

Comparative Example 14

An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound H3, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E3 was used instead of Compound 200B.

Example 47

An anode was prepared by cutting a Corning 15 Ωcm² (1,200 Å) ITO glass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaning the glass substrate by using isopropyl alcohol and pure water for 5 minutes each, and then irradiating UV light for 30 minutes thereto and exposing to ozone to clean. Then, the anode was loaded into a vacuum deposition apparatus.

Compound HT13 was vacuum deposited on the substrate to form a hole injection layer having a thickness of 500 Å. Then, compound HT3, which is a hole transportable compound, was vacuum deposited thereon to form a hole transport layer having a thickness of 450 Å. Then, Compound 100A and FD1 were co-deposited at a ratio of 95:5 to form an emission layer having a thickness of 300 Å.

Then, Compound 200B was deposited on the emission layer to form a buffer layer having a thickness of 100 Å. Then, BPhen and Liq were deposited at a weight ratio of 50:50 on the buffer layer to form an electron transport layer having a thickness of 150 Å. Then, LiF, which is a halogenated alkali metal, was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å. Al was vacuum deposited thereon to a thickness of 1500 Å (cathode), thereby completing the manufacturing of an organic light-emitting device.

Example 48

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 49

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 202B was used instead of Compound 200B.

Example 50

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 203B was used instead of Compound 200B.

Example 51

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 204B was used instead of Compound 200B.

Example 52

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 205B was used instead of Compound 200B.

Example 53

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 206B was used instead of Compound 200B.

Example 54

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 207B was used instead of Compound 200B.

Example 55

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 101A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 56

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 102A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 57

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 103A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 58

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 104A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 59

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 105A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 60

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 106A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 61

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 107A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 62

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 108A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 63

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A.

Example 64

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 65

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 202B was used instead of Compound 200B.

Example 66

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 203B was used instead of Compound 200B.

Example 67

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 204B was used instead of Compound 200B.

Example 68

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 205B was used instead of Compound 200B.

Example 69

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 206B was used instead of Compound 200B.

Example 70

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 207B was used instead of Compound 200B.

Example 71

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 110A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 72

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 111A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 73

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 112A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 74

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 113A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 75

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 114A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Example 76

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 115A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 15

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound H1, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 16

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound H2, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.

Comparative Example 17

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound E1, below, was used instead of Compound 200B.

Comparative Example 18

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound E2, below, was used instead of Compound 200B.

Comparative Example 19

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E1 was used instead of Compound 200B.

Comparative Example 20

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E2 was used instead of Compound 200B.

Comparative Example 21

An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound H3, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E3 was used instead of Compound 200B.

Evaluation Example

Efficiency (at a current density of 10 mA/cm²) and a lifespan T80 (at a current density of 50 mA/cm²) of the organic light-emitting devices of Examples 1 to 76 and Comparative Examples 1 to 21 were evaluated by using PR650 Spectroscan Source Measurement Unit. (product of PhotoResearch Co., Ltd). TSO indicates a time period taken until brightness reduces to 80% of the initial brightness. Results thereof are shown in Tables 1 to 3, below.

TABLE 1 Electron Efficiency T80 Example Emission layer transport layer (cd/A) (hours) Example 1 100A 200B 5.4 130 Example 2 100A 201B 5.4 140 Example 3 100A 202B 5.7 100 Example 4 100A 203B 5.4 120 Example 5 100A 204B 5.8 110 Example 6 100A 205B 5.5 110 Example 7 100A 206B 5.6 120 Example 8 100A 207B 5.7 110 Example 9 101A 201B 5.5 130 Example 10 102A 201B 5.8 100 Example 11 103A 201B 5.6 110 Example 12 104A 201B 5.5 120 Example 13 105A 201B 5.7 100 Example 14 106A 201B 5.2 140 Example 15 107A 201B 5.3 130 Example 16 108A 201B 5.5 100 Example 17 109A 200B 5.5 140 Example 18 109A 201B 5.6 110 Example 19 109A 202B 5.6 100 Example 20 109A 203B 5.5 130 Example 21 109A 204B 5.9 100 Example 22 109A 205B 5.6 110 Example 23 109A 206B 5.9 100 Example 24 109A 207B 5.8 110 Example 25 110A 201B 5.6 120 Example 26 111A 201B 5.9 110 Example 27 112A 201B 5.4 110 Example 28 113A 201B 5.4 120 Example 29 114A 201B 5.8 100 Example 30 115A 201B 5.3 110 Comparative H1 201B 5.0 60 Example 1 Comparative H2 201B 4.8 70 Example 2 Comparative 100A E1 5.2 90 Example 3 Comparative 100A E2 5.3 100 Example 4 Comparative 109A E1 5.2 90 Example 5 Comparative 109A E2 5.3 100 Example 6 Comparative H3 E3 5.4 90 Example 7

TABLE 2 Electron Efficiency Life span Example Emission layer transport layer (cd/A) (hours) Example 31 100A 200B:Liq 5.3 170 Example 32 100A 201B:Liq 5.4 130 Example 33 100A 202B:Liq 5.6 110 Example 34 100A 203B:Liq 5.5 140 Example 35 100A 204B:Liq 5.5 120 Example 36 100A 205B:Liq 5.6 110 Example 37 100A 206B:Liq 5.3 120 Example 38 100A 207B:Liq 5.4 120 Example 39 109A 200B:Liq 5.4 160 Example 40 109A 201B:Liq 5.5 120 Example 41 109A 202B:Liq 5.6 120 Example 42 109A 203B:Liq 5.4 140 Example 43 109A 204B:Liq 5.6 110 Example 44 109A 205B:Liq 5.4 120 Example 45 109A 206B:Liq 5.8 110 Example 46 109A 207B:Liq 5.7 120 Comparative 109A 201B:Liq 4.9 60 Example 8 Comparative 109A 201B:Liq 4.6 70 Example 9 Comparative 100A E1:Liq 5.0 90 Example 10 Comparative 100A E2:Liq 5.1 100 Example 11 Comparative 109A E1:Liq 5.0 90 Example 12 Comparative 109A E2:Liq 5.1 100 Example 13 Comparative H3 E3:Liq 5.2 100 Example 14

TABLE 3 Life Emission Buffer Electron Efficiency span Example layer layer transport layer (cd/A) (hours) Example 47 100A 200B BPhen:Liq 5.4 150 Example 48 100A 201B BPhen:Liq 5.3 160 Example 49 100A 202B BPhen:Liq 5.5 110 Example 50 100A 203B BPhen:Liq 5.3 130 Example 51 100A 204B BPhen:Liq 5.6 110 Example 52 100A 205B BPhen:Liq 5.4 120 Example 53 100A 206B BPhen:Liq 5.6 130 Example 54 100A 207B BPhen:Liq 5.6 130 Example 55 101A 201B BPhen:Liq 5.6 140 Example 56 102A 201B BPhen:Liq 5.9 120 Example 57 103A 201B BPhen:Liq 5.6 120 Example 58 104A 201B BPhen:Liq 5.7 140 Example 59 105A 201B BPhen:Liq 5.5 110 Example 60 106A 201B BPhen:Liq 5.3 160 Example 61 107A 201B BPhen:Liq 5.4 140 Example 62 108A 201B BPhen:Liq 5.6 130 Example 63 109A 200B BPhen;Liq 5.6 160 Example 64 109A 201B BPhen:Liq 5.5 120 Example 65 109A 202B BPhen:Liq 5.7 110 Example 66 109A 203B BPhen:Liq 5.6 150 Example 67 109A 204B BPhen:Liq 6.0 110 Example 68 109A 205B BPhen:Liq 5.6 110 Example 69 109A 206B BPhen:Liq 5.9 100 Example 70 109A 207B BPhen:Liq 5.9 120 Example 71 110A 201B BPhen:Liq 5.5 130 Example 72 111A 201B BPhen:Liq 5.9 120 Example 73 112A 201B BPhen:Liq 5.5 110 Example 74 113A 201B BPhen:Liq 5.6 130 Example 75 114A 201B BPhen:Liq 5.9 110 Example 76 115A 201B BPhen:Liq 5.4 120 Comparative 109A 200B BPhen:Liq 4.9 70 Example 15 Comparative 109A 201B BPhen:Liq 5.0 80 Example 16 Comparative 100A E1 BPhen:Liq 5.4 100 Example 17 Comparative 100A E2 BPhen:Liq 5.4 110 Example 18 Comparative 109A E1 BPhen:Liq 5.4 100 Example 19 Comparative 109A E2 BPhen:Liq 5.4 110 Example 20 Comparative H3 E3 BPhen:Liq 5.4 100 Example 21

As may be seen in Table 1 to 3, the organic light-emitting devices of Examples 1 to 76 exhibited higher efficiency and longer lifespan than the organic light-emitting devices of Comparative Examples 1 to 21.

Organic light-emitting devices according to the embodiments may have high efficiency and long lifespan characteristics.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent to one of ordinary skill in the art as of the tiling of the present application, features, characteristics, and/or elements described in connection with a particular embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise specifically indicated. Accordingly, it will be understood by those of skill in the art that various changes in form and details may be made without departing from the spirit and scope of the present invention as set forth in the following claims. 

What is claimed is:
 1. An organic light-emitting device, comprising: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer includes at least one first material represented by Formula 1 and at least one second material represented by Formula 2:

wherein in Formulae 1 and 2, L₁₁, L₂₁, and L₂₂ are each independently selected from a substituted or unsubstituted C₆-C₆₀ arylene group and a substituted or unsubstituted C₁-C₆₀ heteroarylene group; L₁₂ is selected from a substituted or unsubstituted phenylene group and a substituted or unsubstituted naphthylenyl group; a11 is 0 or 1; a12 is 1 or 2; a21 and a22 are each independently selected from 0, 1, and 2; R₁₁ and R₁₂ are each independently selected from a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group; R₂₁ and R₂₂ are each independently selected from a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolinyl group, and a substituted or unsubstituted isoquinolinyl group; b11, b12, b21, and b22 are each independently selected from 1, 2, and 3; R₁₃, R₁₄, R₂₃, and R₂₄ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstituted C₁-C₆₀ heteroaryl group a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₁)(Q₂)(Q₃); b13, b14, b23, and b24 are each independently selected from 1, 2, 3 and 4; at least one substituent of the substituted C₆-C₆₀ arylene group, the substituted C₁-C₆₀ heteroarylene group, the substituted phenylene group, the substituted naphthylenyl group, the substituted C₆-C₆₀ aryl group, the substituted C₁-C₆₀ heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed hetero-polycyclic group, the substituted pyridyl group, the substituted quinolinyl group, the substituted isoquinolinyl group, the substituted C₁-C₆₀ alkyl group, the substituted C₁-C₆₀ alkoxy group, the substituted C₃-C₁₀ cycloalkyl group, and the substituted C₆-C₆₀ aryloxy group is selected from: a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group; a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₁₁)(Q₁₂)(Q₁₃); a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃); and —Si(Q₃₁)(Q₃₂)(Q₃₃), wherein Q₁ to Q₃, Q₁₁ to Q₁₃, Q₂₁ to Q₂₃, and Q₃₁ to Q₃₃ are each independently selected from a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.
 2. The organic light-emitting device as claimed in claim 1, wherein: at least one of a11, a21, and a22 does not equal 0, and L₁₁, L₂₁, and L₂₂ are each independently selected from: a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an indolylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a benzofuranylene group, a benzothiophenylene group, a triazolylene group, a tetrazolylene group, a triazinylene group, a dibenzofuranylene group, and a dibenzothiophenylene group; and a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an indolylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a benzofuranylene group, a benzothiophenylene group, a triazolylene group, a tetrazolylene group, a triazinylene group, a dibenzofuranylene group, and a dibenzothiophenylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, and an imidazopyridinyl group.
 3. The organic light-emitting device as claimed in claim 1, wherein: at least one of a11, a21, and a22 does not equal 0, and L₁₁, L₂₁, and L₂₂ are each independently selected from: a phenylene group, a naphthylene group, a pyridinylene group, a quinolinylene group and an isoquinolinylene group; and a phenylene group, a naphthylene group, a pyridinylene group, a quinolinylene group, and an isoquinolinylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group.
 4. The organic light-emitting device as claimed in claim 1, wherein: at least one of a11, a21, and a22 does not equal 0, and L₁₁, L₂₁, and L₂₂ are each independently selected from a group represented by any one of Formulae 3-1 to 3-6 below:

wherein in Formulae 3-1 to 3-6, * and *′ indicate binding sites to a neighboring atom.
 5. The organic light-emitting device as claimed in claim 1, wherein R₁₁ and R₁₂ are each independently selected from: a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, a azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, a ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, a imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, a oxazolyl group, an isooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group.
 6. The organic light-emitting device as claimed in claim 1, wherein R₁₁ and R₁₂ are each independently selected from: a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group.
 7. The organic light-emitting device as claimed in claim 1, wherein R₁₁ and R₁₂ are each independently selected from: a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group.
 8. The organic light-emitting device as claimed in claim 1, wherein R₁₁ and R₁₂ are each independently selected from a group represented by any one of Formulae 4-1 to 4-9 below:

wherein in Formulae 4-1 to 4-9, * indicates a binding site to a neighboring atom.
 9. The organic light-emitting device as claimed in claim 1, wherein R₂₁ and R₂₂ are each independently selected from a pyridyl group, a quinolinyl group, and an isoquinolinyl group.
 10. The organic light-emitting device as claimed in claim 1, wherein R₂₁ and R₂₂ are each independently a group represented by any one of Formulae 5-1 to 5-17 below:

wherein in Formulae 5-1 to 5-17, * indicates a binding site to a neighboring atom.
 11. The organic light-emitting device as claimed in claim 1, wherein R₂₁ and R₂₂ are each independently a group represented by any one of Formulae 5-1, 5-2, 5-5, and 5-13 below:

in Formulae 5-1, 5-2, 5-5, and 5-13, * indicates a binding site to a neighboring atom.
 12. The organic light-emitting device as claimed in claim 1, wherein R₁₃, R₁₄, R₂₃, and R₂₄ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethyl group, n-a propyl group, iso-a propyl group, an n-butyl group, a sec-butyl group, iso-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, an n-octyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group.
 13. The organic light-emitting device as claimed in claim 1, wherein R₁₃, R₁₄, R₂₃, and R₂₄ are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethyl group, n-a propyl group, iso-a propyl group, an n-butyl group, a sec-butyl group, iso-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, and an n-octyl group, a group represented by any one of Formulae 4-1 to 4-9, and a group represented by any one of Formulae 5-1 to 5-17:

wherein in Formulae 4-1 to 4-9 and 5-1 to 5-17, * indicates a binding site to a neighboring atom.
 14. The organic light-emitting device as claimed in claim 1, wherein the at least one first material is represented by any one of Formulae 1A and 1B below,

wherein in Formulae 1A and 1B, and 2, L₁₁, a11, R₁₁ to R₁₄, and b11 to b14 are the same as defined with respect to Formula
 1. 15. The organic light-emitting device as claimed in claim 1, wherein the at least one first material is represented by any one of Formulae 1A and 1B below, the at least one second material is represented by any one of Formulae 2A to 2C below,

wherein in Formulae 1A, 1B, and 2A to 2C, L₁₁, a11, R₁₁ to R₁₄, b11 to b14, L₂₁, L₂₂, a21, a22, R₂₂ to R₂₄, and b22 to b24 are the same as defined with respect to Formulae 1 and
 2. 16. The organic light-emitting device as claimed in claim 1, wherein: the at least one first material is represented by any one of Formulae 1A-1 and 1B-1 below, the at least one second material is represented by any one of Formulae 2A to 2C below,

wherein in Formulae 1A-1, 1B-1, and 2A to 2C, L₁₁, a11, R₁₁ to R₁₄, b11 to b14, L₂₁, L₂₂, a21, a22, R₂₂ to R₂₄, and b22 to b24 are the same as defined with respect to Formulae 1 and
 2. 17. The organic light-emitting device as claimed in claim 1, wherein: the at least one first material is selected from Compounds 100 to 263 below, and the at least one second material is selected from Compounds 300 to 401, below,


18. The organic light-emitting device as claimed in claim 1, wherein: the organic layer includes: an emission layer, and an electron transport region between the second electrode and the emission layer, the emission layer includes the at least one first material, and the electron transport region includes the at least one second material.
 19. The organic light-emitting device as claimed in claim 18, wherein: the electron transport region includes an electron transport layer, and the electron transport layer includes the at least one second material.
 20. The organic light-emitting device as claimed in claim 18, wherein: the electron transport region includes a buffer layer, and the buffer layer includes the at least one second material. 